Solution:
As per the given question,
Consider,
Therefore \[AB\text{ }=\text{ }A\]
Again consider, \[BA\] we get,
Hence \[BA\text{ }=\text{ }B\]
Hence the proof.
Solution:
As per the given question,
Consider,
Therefore \[AB\text{ }=\text{ }A\]
Again consider, \[BA\] we get,
Hence \[BA\text{ }=\text{ }B\]
Hence the proof.